Vapor Chamber Recessed Casing for Thermal Coupling
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Solution Overview
Problem
Current vapor chambers face challenges in achieving improved thermal coupling between the container walls and heating elements, limiting their thermal diffusion performance.
Innovation Solution
The vapor chamber design incorporates recessed portions on the casing's external surface and corresponding protruding portions on the internal surface, along with a wick structure, to enhance thermal coupling by creating an anchor effect and improving the wet spread property of the jointing material, allowing for a tighter and more reliable joint with reduced thermal resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional smooth casing surfaces are used, then manufacturing is simple, but thermal coupling between the vapor chamber and heating element is insufficient
Solution Approach 1:
The patent applies curvature by forming recessed portions on the external surface and corresponding protruding portions on the internal surface of the casing. These curved/rounded features create an anchor effect that improves thermal coupling between the vapor chamber and heating element, resolving the contradiction between simple manufacturing and sufficient thermal coupling.
Solution Approach 2:
The patent utilizes the wick structure with porous characteristics to enhance thermal coupling. The porous wick material allows for better thermal contact and heat transfer between the heating element and the vapor chamber, addressing the thermal coupling issue while maintaining reasonable structural complexity.
2Temperature
If the jointing material layer is made thin for better thermal coupling, then thermal resistance decreases, but the joint becomes less reliable
Solution Approach 1:
The recessed and protruding portions create a mechanical interlock that allows the jointing material to form a reliable bond even in thin layers. The curved features distribute stress and prevent delamination, enabling thin jointing material layers to achieve both low thermal resistance and high joint reliability.
Solution Approach 2:
The patent applies local quality by concentrating the jointing material in specific recessed areas rather than requiring a uniform thick layer. This localized approach reduces overall thermal resistance while maintaining joint reliability through strategic placement of bonding material in high-stress regions.
3Loss of energy
If graphite sheets are used for heat dissipation, then implementation is simple, but heat transport capability is insufficient
Solution Approach 1:
The patent employs phase transitions of the working fluid (vaporization and condensation) within the closed vapor chamber to achieve high-efficiency heat transport. This phase change mechanism provides superior heat transport capability compared to graphite sheets, justifying the increased structural complexity of the vapor chamber system.
Solution Approach 2:
The vapor chamber acts as an intermediary heat transfer device between the heating element and the environment. The working fluid serves as a mediator that efficiently transports heat through phase changes, providing better heat dissipation performance than direct graphite sheet contact while managing the added system complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design enhances thermal coupling, increases the surface area for heat absorption and radiation, and improves the reliability and flexibility of the vapor chamber, leading to more effective thermal diffusion and resistance to damage.
Implementation Method 1
The working fluid is vaporized by heat from a heat source, moves in an internal space, thereafter releases the heat to outside, and returns to liquid
Implementation Method 2
The working fluid is vaporized by heat from a heat source, moves in an internal space, thereafter releases the heat to outside, and returns to liquid
Implementation Method 3
enables two-dimensional and high-speed diffusion of the heat with use of latent heat of vaporization and condensation of the working fluid
Implementation Method 4
The working fluid having returned to the liquid is carried again to a vicinity of the heat source by a capillary structure referred to as wick
Implementation Method 5
enhance thermal coupling by creating an anchor effect and improving the wet spread property of the jointing material
Implementation Method 6
improving thermal coupling property between the container walls of the heat pipe and the heating element
Data Source
AI summary
A vapor chamber that includes a casing, a pillar in an internal space of the casing and that supports the casing from an inside thereof, a working fluid in the internal space of the casing, and recessed portions in at least a portion of a main external surface of the casing.